The aircraft was kept on the tarmac for around four hours while police checked through cabin baggage and interviewed passengers.

A spokeswoman for Jet2 told the ECHO: “Czech Authorities were called to undertake security checks on one of our aircraft in Prague yesterday, due to a security alert.

"The aircraft has been cleared to return to service following these checks. We apologise to customers for any inconvenience caused, however the safety and welfare of everyone onboard will always be our number one priority.”

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She said: “We were just told the flush was broken and we should use the toilets at the back of the plane. Everything seemed normal during the flight.

“As soon as we landed the captain said someone had left a threatening note in a toilet and we were not to move and had to leave everything on the plane.

“It was a lot calmer than I would have thought actually. Everyone was looking around but it was quite orderly.

“We got off the plane in about 10 minutes but then we were waiting on a bus to the terminal for around. We’ve been waiting inside the airport for about four hours since then. They’ve given us water, tea and biscuits but nobody from Jet2 is here.

“We don’t know what the threat was. And we haven’t been told anything.

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“At the the minute we’re just waiting to collect our bags. They’ve taken all the luggage off the plane and the police have interviewed us one by one while we queue.”

In a tweet, officials from Prague Airport confirmed that the disruption was due to a potential bomb threat.

They wrote: “Hello, @PolicieCZ checked the aircraft because of potential bomb threat. At the moment all cabin baggage need to be checked, estimated time is after 10 pm. Please contact handling employees on site for further information. Thank you.”

They later added: "Update: All checks are finished with negative results. The flight back to Manchester will be operated by backup aircraft around midnight. Departing PAX should contact their handling agents in the gate for additional info."